
      
        
.middle {
    position: absolute;
    /* left: 0px;
    margin-left: 0px; */
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.card {
    cursor: pointer;
    /* width: 280px; */
    width: 100%;
    height: 100%;
}

.front,
.back {
    width: 96%;
    height: 96%;
    margin: auto auto;
    overflow: hidden;
    backface-visibility: hidden;
    position: absolute;
    transition: transform 0.6s linear;
}

.front {
    background-image: url("../../imgs/dy_wzx02.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
}
/* .front img {
    height: 100%;
    width: 100%;
} */

.front {
    transform: perspective(600px) rotateY(0deg);
}

.back {
    background: #f1f1f1;
    transform: perspective(600px) rotateY(180deg);
}

.back-content {
    color: #2c3e50;
    text-align: center;
    width: 100%;
    margin-top: 10px;
}

.sm {
    margin: 20px 0;
}

.sm a {
    display: inline-flex;
    width: 40px;
    height: 40px;
    justify-content: center;
    align-items: center;
    color: #2c3e50;
    font-size: 18px;
    transition: 0.4s;
    border-radius: 50%;
}

.sm a:hover {
    background: #2c3e50;
    color: white;
}

.card:hover>.front {
    transform: perspective(600px) rotateY(-180deg);
}

.card:hover>.back {
    transform: perspective(600px) rotateY(0deg);
}

.biaoqian {
    font-size: 10px;
    overflow: hidden;
    width: 90%;
    margin: 0 auto
}

.biaoqian div {
    width: 70px;
    border: 1px solid #999999;
    border-radius: 15px;
    float: left;
    margin-left: 10px;
    margin-bottom: 10px;
}

.bj_top {
    height: 60px;
    background-color: green;
    margin-bottom: 10px;
}

.hbj {
    /* 距离上面的绿条的高度 */
    /* margin-top: -40px; */
    width: 100px;
    height: 100px;
    border-radius: 50%;
    z-index: 1
}

p.mytext {
    margin-top: 10px;
    text-align: justify;
    text-indent: 25px;
}

.page-header {
    text-align: center;
}

#dao {
    margin-right: 0;
}

#dao ul {
    list-style: none;
}

#dao ul li {
    margin: 10px;
    float: left;
    width: 33%;
    height: 300px;
    width: 300px;
    position: relative;
}

@media (max-width: 768px) {
    #dao ul li {
        width: 100%;
        height: 450px;
    }
}

@media (min-width: 768px) {
    #dao ul li {
        height: 250px;
    }
}

@media (min-width: 992px) {
    #dao ul li {
        height: 350px;
    }
}
